Edwards 3-ASU Istruzioni per il montaggio

3-ASU and 3-ASU/4 Audio Source Unit

Installation Sheet

Description

The 3-ASU and 3-ASU/4 provide controls for emergency

paging. The 3-ASU/4 also provides a four-slot rail for installing

local rail modules.

Both units can store and play back prerecorded messages and

have inputs for connecting remote microphones and MN-FVPN

VoIP Encoder/Decoder modules.

The 3-ASU and 3-ASU/4 require one chassis space in an

enclosure. The 3-ASU includes a filler plate that mounts on the

cabinet inner door to prevent access to the electronics.

Installation

WARNING: Remove all sources of power from the cabinet

before installing or removing components. Failure to do so may

result in serious injury or loss of life.

1. Attach the chassis to the backbox using the hardware

provided. Align the backbox mounting studs with the holes

indicated in Figure 1.

2. Attach the ASU to the chassis using six 6/32 x 3/8 pan

head screws. Press the RCIC card onto the PEM studs.

See Figure 2.

3. Connect the ribbon cable (P/N 250195-01) between the

ASU card and the RCIC card.

4. If used, install the 3-ASUMX memory card. Make sure the

write protect switch is in the “off” or “write enabled”

position.

5. Connect the RCIC card to the other chassis rail

assemblies. See Figure 6 or Figure 7.

6. Plug the ribbon cable (P/N 250194-00) from the 3-ASU

cover assembly into J3 on the ASU card. See Figure 3.

7. Lift the 3-ASU cover assembly onto the chassis mounting

studs then attach it with the locknuts provided in the

hardware kit. See Figure 4.

Figure 1: Chassis mounting diagram

Note: 3-ASU/4 chassis shown.

Figure 2: Circuit board mounting diagram

Note: 3-ASU chassis shown.

2 / 6 P/N 270482 • REV 06 • REB 18JAN13

Figure 3: Cover installation

Note: 3-ASU/4 chassis shown.

Figure 4: Installation complete

Note: 3-ASU/4 chassis shown.

Wiring

Wire the 3-ASU and 3-ASU/4 as shown in Figure 5, Figure 6,

and Figure 7.

Notes

•All wiring is supervised and power-limited.

•If a 3-RS485 card is not installed, connect AUDIO DATA

PRIMARY on the ASU card to AUDIO A OUT on the

3-CPUx card. See Figure 5.

If a 3-RS485 card is installed, connect AUDIO DATA

PRIMARY on the ASU card to AUDIO A IN on the 3-CPUx

card.

•Wiring from a 3-REMICA or 3-REMICP must be shielded

and enclosed in conduit. See Figure 5.

•All shields must be continuous and insulated from ground,

except at the originating panel.

•The REMOTE input is for MNEC applications only. Not for

supplemental use.

Figure 5: ASU card wiring diagram

P/N 270482 • REV 06 • REB 18JAN13 3 / 6

Figure 6: 3-ASU RCIS card wiring diagram

4 / 6 P/N 270482 • REV 06 • REB 18JAN13

Figure 7: 3-ASU/4 RCIC card wiring diagram

P/N 270482 • REV 06 • REB 18JAN13 5 / 6

Specifications

Voltage

24 VDC

Current

Standby

Alarm

80 mA

Ground fault

impedance

0.1 Ω

Wire size

22 to 12 AWG (0.5 to 2.5 mm²)

Dimensions

12.0 x 19.0 x 5.25 inches

(30.48 x 48.26 x 13.34 cm)

Mounting

One chassis space

Audio channels

8 simultaneous

Audio inputs

Local microphone (isolated and supervised)

Remote microphone (isolated and

supervised)

Firefighter's telephone (isolated and

supervised)

Remote audio (isolated and supervised)

Prerecorded message

storage

Two minutes expandable to 100 minutes with

optional 3-ASUMX/nn memory card

Operating environment

Temperature

Humidity

32 to 120°F (0 to 49°C)

0 to 93% RH, noncondensing at 90°F (32°C)

Contact information

For contact information, see www.edwardsutcfs.com.

6 / 6 P/N 270482 • REV 06 • REB 18JAN13

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